Ford 2001 Ranger, Manual

Page: 14 / 1218

100-04-2 100-04-2 Noise, Vibration and Harshness
The power steering pump will create a whine when
DESCRIPTION AND OPERATION
operated. This whine can be identified by turning
Condenser Fan
the vehicle on and turning the steering wheel with
WARNING: Disconnect the cooling fan
the vehicle stationary. This will cause the pump
prior to performing any underhood repairs
motor to increase speed, which will increase the
because the fan could cycle.
volume and pitch of the whine. Once the steering
wheel has been turned and the wheel is released, the
The two-speed cooling fan is located behind the
pump motor will decrease to minimum speed.
radiator, attached to the fan shroud. The cooling fan
is controlled by the interface adapter assembly
(IAA) that will energize the cooling fan under the
Traction Battery Cooling/Ventilation
following conditions:
Fan
•
Coolant temperature is higher than normal.
The NiMH traction battery has a recirculation fan
•
A/C compressor is on in A/C and Defrost modes
and a cooling fan that operate independently of each
when the vehicle speed does not provide enough
other to cool the traction battery. The cooling fan
airflow through the condensor.
exchanges warm air from inside the traction battery
with cooler outside air, while the recirculation fan
Cooling fan noise will be noticed when the vehicle
circulates the cool air around the battery modules.
is turned on and the coolant is hot or the A/C is
The fans will operate during charging or during
turned on. The fan operation can be verified
vehicle usage if the temperature of the modules
visually.
becomes too high. The sound of the fans when
operating is similar to that of an electric radiator
Condenser Fan —Postal Ranger EV
cooling fan.
WARNING: Disconnect the cooling fan
prior to performing any underhood repairs
Transaxle
because the fan could cycle.
The transaxle is located in the rear of the vehicle
The two-speed cooling fan is located behind the
between the rear wheels and contains the electric
radiator, attached to the fan shroud. The cooling fan
motor that powers the vehicle. A faint whine may
is controlled by the interface adapter assembly
be heard from the transaxle while the vehicle is in
(IAA) that will energize the cooling fan under the
motion. The transaxle produces a low-level gear
following conditions:
whine directly related to the vehicle speed.
•
Coolant temperature is higher than normal.
Vacuum Pump
Cooling fan noise will be noticed when the vehicle
is turned on and the coolant is hot . The fan
The vacuum necessary for operation of the Electric
operation can be verified visually.
Vehicle brake and climate control systems is
provided by an electrically driven vacuum pump.
This pump is located in the underhood compartment
Power Steering Pump
underneath the card table and is visible from the
The power steering pump is located in the
bottom of the vehicle.
underhood compartment between the card table and
Upon start-up of the Electric Vehicle, the first
the inner fender. The power steering pump operates
prominent noise that is heard is the vacuum pump.
whenever the vehicle is turned on. Pump operation
The vacuum pump noise is identified as a buzzing
is controlled based upon vehicle speed and steering
that occurs when the vehicle is first turned on. With
demands.
the vehicle on and stationary, pump operation will
be noticed when the brakes are applied or if the
climate control is being operated. The pump will
activate to maintain a preset range of vacuum in the
system. Constant vacuum pump operation may
indicate a vacuum leak.
2001 Ranger EV, 01/2001